Looking for part info in Viewsonic 17PS monitor

[Roger Shum]

Hi, there,

My Viewsonic 17PS monitor died last night.
I opened it up and found that R802 is burnt.

It looks like a varistor.
The part has the following marking on it:
" 120
M 6D19
17"

The "M" are in a square.

Do anyone know the part no. and the manufacturer?

I only see this part burnt. Would I see more problem -
Is this part the real problem or caused by some other
part that failed?

Thanks for the help!
Roger